Outboard motor



Sept. 8, 1942. w.. L. KissEL OUTBOARD MOTOR Filed Nov. 16, 1940 2 Sheets-Sheet l M w l a jisseZ A l A Sept. 8, 1942. w. L. KlssEL 2,295,086

OUTBOARD MOTOR Filed Nov. 16, 1940 2 sheets-shet 2 q1/11111111- I I Patented Sept. 8, 1942 OUTBOARD MOTOR William L. Kissel, Hartford, Wis., assigner to B. M. Kissel, Hartford, Wis., doing business as Kissel Industries Application November 16, 1940, Serial No. 366,003

(Cl. 115l7) 18 Claims.

water to the engine, located below the water line but above the underwater shaft housing and housed in the vertical drive shaft casing with the drive shaft carrying the operating part of the pump.

Another object is to provide a water pump for an outboard motor, located within the drive shaft casing of the motor and utilizing a portion of the interior of said casing as a, part of the water inlet passage.

A further object is to provide a water pump for an outboard motor, located within the drive shaft casing of the motor, and an anti-cavitation plate surrounding that portion of said casing in which the pump is located, with the plate provided with portions serving as part of or functioning with the water passages of the pump.

Still another object is to provide in an outboard motor a water pump, an exhaust-pipe, and an anticavitation plate supporting in a novel manner portions of both the pump and exhaust p1pe.

A still further object is to provide in an outboard motor anv anticavitation plate and an exhaust pipe, the lower end of which bears a novel relation to and is supported in a, novel manner by the anticavitation plate.

Other objects and advantages will become apparent from the following description taken in connection with the accompanying drawings, in which:

Figure l is aside elevational view on a reduced scale of the underwater portions of an outboard motor embodying the features of the invention.

Fig. 2 is a fragmentary front elevational View.`

modifications and alternative constructions, I-- have shown in the drawings and will herein de-gscribe in detail, the preferred embodiment,` but it is to be understood that I do not thereby intend to limit the invention to the specific form dis-fclosed, but intend to cover all modificationsandalternative constructions fallingwithin thegspir-it and scope of the invention as expressed inI the appended claims.

An outboard motor of the type herein contemplated comprises generally a bracketfor securingv the motor to the stern of a boatand supporting the motor for pivotal movement' about'a horizontal axis extending transverse to thelengthof the boat, and also for pivotal-f movement about a. ver--A tical axis for steering purposes. The bracket rsup'- ports the engine and the latter has a downwardly extending drive shaft enclosed in a drive shaft casing. Atthe lower end ofA the drive shaft cas.; ingfis a housing carrying a horizontally extendling propeller shaft having a gearing connection with the drive shaft, a propeller being: mounted on the drive shaft outside of the casing. The` en gine also has a downwardly extending exhaust; pipe so that the exhaust'gases may loe-discharged under the water. In the case of a' water-cooled motor, connections are also provided for carrying water from a point below the water line upwardly to the engine. A

The present invention involves a novel arrangement of a water pump for supplyingvcooling water to the engine. In the present instance the water pump is mounted on and driven by the veritically extending drive shaft. The present invention also contemplates a novel arrangement for discharging the exhaust gaseslbelow the water line.

As shown in the drawings which illustrate-the' underwater portions of the motor, the vertically extending drive shaft connected with the engine is indicated at iii. Surroundingthe drive shaft i is a casing l I which in the present instance vis a cylindrical tube. Secured to the lower end of the drive shaft casing ll is an underwater housing i2 into which the dri-ve shafty I extends and in which is journaled a horizontal propeller shaft (not shown) having a gearing connection with the drive shaft I0; The propeller shaftextends' rearwardly from the housing l2 andt on' its'pro# jecting end carries' a propeller I3. Ain exhaust pipe I4 also extends downwardly from"Y the yengine to conduct the exhaust gases to a point below the water line.

While any suitable form of connection maybe provided' between the drive'shaft casing l`l'y arid the underwater unit I2, in the present instance the upper end portion, indicated at I5, of the housing I2 is of reduced diameter and is telescoped within the lower end of the drive shaft casing II (see Fig. 3). To secure the housing I2 and casing I I against relative endwise movement, a plurality of screws I 6 may be threaded into the reduced portion I5 of the housing. A bushing I1 may, if desired, be placed in the housing I2 to serve as a bearing for the drive shaft I.

In the case of outboard motors which have sunicient speed to cause cavitation adjacent the propeller, an anticavitation plate is placed above the propeller to prevent air from being drawn down from the surface of the water b-y such cavitation. In the present instance an anticavitation plate, indicated generally at 2D, is utilized. In the preferred form, the anticavitation plate 2E) comprises a rear section 2| and a front section 2 2. These two sections meet in a transverse plane including the axis of the drive shaft, and each has an upwardly extending hub portion 23. To clamp the two sections together and to hold them rigid with the drive shaft casing II, the two sections are provided with enlargements 24 spaced laterally from the drive shaft casing and drilled and tapped to receive screws 2 5. The hub portions 23 of the two sections of the anticavitation plate are also provided with bosses 25 which are drilled and tapped to receive screws 21. Thus the two sections of the anticavitation plate are rigidly secured together and are rigidly clamped around the drive shaft casing II.

In most outboard motors it is customary practice to have the gearing connection between the drive shaft I3 and the propeller shaft of the reducing type. Thus the drive shaft I has a somewhat greater speed than the propeller shaft. In the present instance, advantage is taken of this greater speed of the drive shaft I0 by having the pump driven thereby in order that the supply of cooling water to the engine may be fully adequate. The pump in the present instance is preferably of the sliding vane type and the sliding vane is carried by the drive shaft Ill.

In its preferred form, the pump comprises a pump body 3U (see Figs, 3, 4 and 6) of generally cylindrical form surrounding the drive shaft I0 and snugly fitting within the interior of the drive shaft casing II. The pump body 3B is provided with an eccentric chamber 3| in which a sliding vane 32 operates. In order to provide suitable diameters, the drive shaft casing I0 is provided with a sleeve 33 which is rigidly secured to the drive shaft and extends into the chamber 3|. A transverse slot is cut through the sleeve 33 and the drive shaft I0 to slidably receive the vane 32. The lower end of the chamber 3l is open and a cover plate 34 is secured thereto as by screws extending vertically into the pump body.

The pump is preferably located immediately above the housing I2 so that the cover plate 34 rests On the top surface of the reduced portion I of the housing. A recess may be cut in the reduced portion I5 to receive a sealing washer 35 of cork or other suitable material. In order to facilitate assembly of the pump body 3 within the drive shaft casing I I in their proper relative position, the outer surface of the pump body is provided with a vertically extending groove 36 (see Figs, 4 and 6) which is flared at its upper end as at 31. A lug 38 is punched inwardly in the casing II (see Fig. '1) to t in the slot 3E, thereby holding the casing and pump body against relative rotation, Thus, when assembling the parts, the pump body 35 is slid longitudinally into the drive shaft casing and the lug 38 enters the flared portion 31 and thence is guided into the groove 36, the flared portion 31 causing the pump body to shift rotatably as much as is necessary for proper positioning.

The water intake and outlet passages for the pump are also arranged in a novel manner. Thus the pump body is provided with a radial aperture 4I) opening into the chamber 3| and communicating with a vertically extending groove 4I cut in the periphery of the pump body, as shown in Figs. 4 and 6. Since the pump body 3E] nts snugly within the drive shaft casing II, the groove 4I with the drive shaft casing forms a closed passage which opens at its upper end into the interior of the drive shaft casing above the pump body. Water is supplied to the interior of the drive shaft casing so that it may be drawn into the chamber 3l through the groove 4I and the aperture 49. To this end the drive shaft casing Il immediately above the hub 23 of the anticavitation plate on its front face is provided with a plurality of small apertures 42 through which water enters the drive shaft casing. Since these apertures face forwardly, the movement of the structure through the water forces the water in through these apertures. While the use of a plurality of small apertures, such as the apertures 42, instead of one large opening, serves to a great extent to prevent entrance of foreign material, a weed guard may be provided in front of the apertures to prevent weeds from clogging them. To this end a wire 43 may be bent in the form of a triple U, two facing downwardly and the center one facing upwardly, as shown in Fig. 2, to extend upwardly in front of the drive shaft casing. To hold the weed guard 43 in place, the ends of the wire are forced into holes drilled in the upper edge of the hub 23 of the anticavitation plate.

The outlet from the pump comprises a rearwardly extending radial aperture 44 in the pump body registering with a hole in the drive shaft casing I I and with a passage 45 formed in an enlargement 46 of the hub portion of the rear section of the anticavitation plate. In'order to hold the aperture 44, the hole in the drive shaft casing and the passage 45 in alinement, the three are counterbored to receive a cylindrical bushing 41 fitting snugly therein. The bushing 41 not only holds these openings in alinement, but further acts as a seal to prevent leakage at this point. The passage 45 in the enlargement 45 is of L shape having one leg extending upwardly to receive a pipe fitting B to which is connected a water pipe 5I extending upwardly to the water jacket of the engine. Preferably the pipe 5I is located immediately in the rear of the drive shaft casing II.

The invention also includes a novel arrangement for the lower end of the exhaust pipe I4 and the relation thereof to the anticavitation plate. Such arrangement includes an exhaust pipe tting 52 telescoped over the lower end of the exhaust pipe I4, as illustrated in Fig. 3. In the preferred construction, the exhaust pipe I4 and the fitting 52 are of streamlined construction of the type having a bluntly rounded front contour and a trailing rear contour. To rigidly hold the fitting 52 in place, the anticavitation plate 2I has secured to its upper surface a ring 53. In the preferred construction, the ring 53 is provided with artransverse rib 54 and a lug 55 into which screws 56 are threaded from the antitelescope into the lower endlof' the exhaust pipe?` l4iandithe fitting 52`and thus holdlthemvinpl-ace'.: To secure thev two rigidlly together; a screw 5T mayextend through-the fitting 52` and-be thread-- ed into the sidel of the ring 53. The ttingf 521i isA provided with a rearwardly and downwardly extending nozzle portion 58 which communicates. With-a rearwardi opening 59 in the exhaustpipe: I4 and which carries the exhaust gases to a pointv spaced rearwardlyV from the propeller so that they area carried away by the stream cf water. forced-rearwardly by the propeller.

The arrangement of. the. various parts hereinV shown issuch. that they allmay be very readily.v assembled, or disassembled in case of repair. 'Ifl'ius the pump may be put in place around the drive shaft andwithin the drive shaft. casing l I, andthe lower housing lf2? assembled within'. the casing. The two parts. of the anticavitation plate: are then readily. assembledtwith the bushing l1-holding the various openings comprising the outlet of the pump in alinement. At the same-time that the rear section of the anticavitation plate is put in place, the exhaust fitting. 52'. and its supporting ring 53.' may be secured in place; These parts it will be noted may bereadily. disassembled in case-of repair.

From thel foregoing., it willbe apparent that I-"have provided a novel arrangement for a pump to supplyv cooling water tothe. engine. While it is located below the water line itis housed within the vertical drive shaft casing so that it may be driven by the higher speed drive shaft rather. than the. propeller shaft; The drive shaft itself carries the operating par-t of the pump, namely, the.vane, andthe drive shaft casing above the pump serves aspart' of the pump intake. The anticavitationplate has a portion provided with a passage constituting apart ofl thel outlet for. a'. pump andprovidinga convenient means for securing the lower end of the pipe which conducts. the water up to the engine jacket. The anticavitation plate also serves to steady and hold inplace the lower end of the exhaust pipe.

I claim as my invention:

1. In an outboard motor the combination of a vertically positioned cylindrical tube of substantially uniform diameter, a shaft housing having its upper end telescoped within said tube, a drive shaft mounted within said tube and extending into said housing, a pump body mounted within and held against rotation by said tube and resting on the upper end of said housing, and a rotatably operating pump element located within said pump body and driven by said shaft.

2. In an outboard motor, the combination of a vertical drive shaft casing, a drive shaft extending therethrough, a pump mounted in the lower part of said casing and operated by said shaft, said pump having an intake passage in communication with the interior of the drive shaft casing above the pump, and means permitting a ow of water into the interior of said casing located above said pump.

3. In an outboard motor, the combination of a vertical drive shaft casing, a drive shaft extending therethrough, a rotary pump located within the lower portion of said casing and operated by said drive shaft, and an anticavitation plate mounted on said casing and having a hub surrounding that portion of the casing within which said pump is located.

4. In an outboard motor, the combination of a vertical drive shaft casing, a drive shaft within said casing, a pumpY located' within said. casing.

and operated by said. sha-ft',` a water intake for.r

said:` pump in said casing above. the pump, ari; anticavitation plate mounted onsaid casing andi having a hub surrounding that. portion ofthe casing'within which the pump is mounted, andY a`- weedv guard mounted in said hub andv extending upwardly in front of: said intake;

5. Inan outboardI motor, theV combination ofza verticalY drive shaft casing, a drive shaft within` said casing, ali pumpv located within saidY casing and operatedy by said' shaft, an anticavitation'. plate mounted on said casing.. and having a. hub? surroundingthat portion of the" casing within; which the pump .is mounted,` said .pump having ani intake.- passage. in communication with the in-v teriorv of'thecasing above the pump, and an. intake in the front of said drive shaft casing openingl into the interior`r thereof and located above said pump; and said hub.

6. .In anoutboard'motor, thev combination of a verticaldrive shaft casing, a drive shaft within' said casing, a pump located within said casing. and'operated by said shaft, said pump having an outletpassage extending through said casing, and' an anticavitation plate mounted on said casing` and having a. hub provided with a water passage in communication with said outlet passage;

7. Inzan outboard motor, the combination of a verticalidrive shaft casing, atdrive. shaft within said casing, a pumpv within said casing operated by said. drive shaft, saidpump having a rearwardly extending; outlet passage extending through said casing, an anticavitation plate mounted on said casing andhaving a hub provided with an L-shaped water passage, one end of-thepassage being in communication with the outlet of the pump, and a water pipe secured to the. other end of the L-shaped passage for oonductingwater to the engine..

8. In. an outboard motor, the combination of a vertical drive shaft casing, a driveshaft within said casing, a pump within said casing operated by said shaft, said pump being provided with an outlet passage, an anticavitation plate mounted on said casing and having an enlarged portion located adjacent said outlet, said enlarged portion being provided with a water passage and said casing being provided with an aperture, and a sleeve extending through said aperture with one end located within said outlet and the other end located within the water passage in the enlarged portion of the anticavitation plate and serving to hold said outlet, said aperture and said water passage in alinement.

9. In an outboard motor, the combination of a vertical drive shaft casing, a drive shaft within said casing, a pump within said casing operated by said drive shaft and having an outlet passage, said casing having an aperture alined with said outlet passage, an anticavitation plate mounted on said casing and comprising front and rear sections, an enlarged portion on the upper face of said plate having a water passage alined withVY said aperture and said outlet, and means to clamp said front and rear sections together tightly around said casing and holding said enlarged portion in substantially water-tight relation to said casing.

10. In an outboard motor, the combination of a vertical drive shaft casing, a drive shaft within said casing, a pump within said casing operated by said drive shaft, an anticavitation plate mounted on said easing and having a water passage serving as a part of the outlet for said pump,

an exhaust pipe extending parallel to said casing, and means on the upper face of said plate for locating and supporting the lower end of the exhaust pipe.

1l. In an outboard motor, the combination of a vertical drive shaft casing, a drive shaft within said casing, a pump within said casing, an anticavt-ation plate secured to said casing and extending rearwardly therefrom, a vertical exhaust pipe spaced rearwardly from said casing and having its lower end located and supported by said anticavitation plate, an enlarged portion on the upper face of said plate located between said exhaust pipe and said casing and having a passage therein serving as part of the outlet for the pump, and a water pipe connected to said passage and extending vertically between said casing and said exhaust pipe.

12. In an outboard motor, the combination of a vertical drive shaft casing, an anticavitation plate secured to said casing and extending rearwardly therefrom, an exhaust pipe extending downwardly at the rear of said casing, and a fitting secured to the exhaust pipe and having its lower end supported and positioned by said anticavitation plate.

13. In an outboard motor, the combination of a vertically extending drive shaft casing, an anticavitation plate mounted on said casing and extending rearwardly therefrom, a vertically extending exhaust pipe located in the rear of said casing, a fitting secured to said exhaust pipe, and a flange member secured to the upper face of said anticavitation plate and intertting with the lower end of said fitting.

14. In an outboard motor, the combination of a vertical drive shaft casing, an anticavitation plate mounted on said casing and extending rearwardly therefrom, a vertical exhaust pipe located rearwardly of said casing, a tting telescoped over the lower end of the exhaust pipe, and a flange member secured to the upper face of said anticavitation plate and telescoped within the lower end of said fitting.

l5. In an outboard motor, the combination of -a vertical drive shaft casing, an anticavitation plate secured to said casing, a vertically extending exhaust pipe located rearwardly of said casing, a fitting secured to the lower end of said exhaust pipe, and means on the upper face of said anticavitation plate for supporting said tting, said tting being provided with a nozzle portion extending downwardly and rearwardly and located rearwardly of the rear edge of the anticavitation plate.

16. In an outboard motor, the combination of a vertical drive shaft casing, a housing secured to the lower end of said casing, a propeller carried by said housing, an anticavitation plate mounted on said drive shaft casing and extending over and rearwardly beyond the propeller, an exhaust pipe located rearwardly of the drive shaft casing, and a fitting for the lower end of said exhaust pipe supported by said anticavitation plate, said tting having a nozzle portion extending rearwardly of the rear edge of the anticavitation' plate and thence downwardly at an angle at the rear of the propeller.

17. In an outboard motor, the combination of a tubular drive shaft casing, a drive shaft extending through said casing, and a pump body fitting snugly within said casing adjacent one end thereof and around said shaft, said pump body being provided with a groove and said casing having an inwardly extending lug tting in said groove to facilitate assembly of the pump body within the casing.

18. In an outboard motor, the combination of a tubular drive shaft casing, a drive shaft within said casing, a pump body fitting snugly within said casing adjacent one end thereof and around said shaft, a housing unit secured within said one end of the casing, said pump body having an outlet extending through said casing, said casing and said pump body having cooperating means to angularly aline the pump body within the casing, and means clamped to the outside of the casing providing a water passage connecting with said outlet.

WILLIAM L. KISSEL. 

